You cannot be of this world and of God's world. It's one or the other. The bible also states that if you add or take away from God's word you will have trouble. So I would be careful treating the Lord's word so lightly. God is our creator but he will also be our finisher. He will only be patient with our sinning for so long and once that time is up, it will be time to judge those that deserve to be punished and those that deserve the gift of God's grace.
Revelation chp. 22 verses 18-19
18 For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book:
19 And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and from the things which are written in this book.